<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>
        <a href="/">权限管理</a>
      </el-breadcrumb-item>
      <el-breadcrumb-item>权限列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区 -->
    <el-card>
      <!-- 添加角色按钮区 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom',i1 === 0 ? 'bdtop' : '','vcenter']"
              v-for="( item1 , i1 ) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级 -->
              <el-col :span="19">
                <el-row
                  :class="[(i2 === 0 ? '' : 'bdtop'),'vcenter']"
                  v-for="(item2 , i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      type="success"
                    >{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      v-for="( item3 ) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >{{ item3.authName }}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
            >分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%"  @close="setRightDialogClosed">
      <el-tree show-checkbox :data="rightslist" :props="treeProps" node-key="id" default-expand-all :default-checked-keys="defkeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    // 所有角色列表数据
    return {
      rolelist: [],
      setRightDialogVisible: false,
    //   所有权限的数据
      rightslist: [],
      treeProps: {
          label: 'authName',
          children: 'children'
      },
      defkeys: [],
      roleId: ''
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    // 获取所有角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败");
      }
      this.rolelist = res.data;
    //   console.log(this.rolelist);
    },
    async removeRightById(role, rightId) {
      const confirmResult = await this.$confirm(
        "此操作将永久删除该权限, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);
      if (confirmResult !== "confirm") return this.$message.info("取消删除");
      // console.log("删除")
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败");
      }
      // this.getRolesList();
      role.children = res.data;
    },
   async showSetRightDialog(role) {
       this.roleId = role.id;
        // 获取所有权限的数据
        const { data : res } = await this.$http.get('rights/tree');
        if( res.meta.status !== 200){
            return this.$message.error('获取数据失败');
        }
        // 把获取到的权限数据保存到data中
        this.rightslist = res.data;
        this.getLeafKeys(role, this.defkeys);
        this.setRightDialogVisible = true;
        // console.log(this.rightslist);
    },
    // 通过递归的形式获取角色下所有三级权限的id 并保存到defkeys数组中
    getLeafKeys(node, arr) {
        // 如果当时node节点不包含children属性则是三级节点
        if(!node.children){
            return arr.push(node.id);
        }
        node.children.forEach(item => {
            this.getLeafKeys(item, arr);
        });
    },
    // 监听分配权限对话框关闭事件
    setRightDialogClosed() {
        this.defkeys = [];
    },
    // 点击为角色分配权限
   async allotRights() {
        const keys = [...this.$refs.treeRef.getCheckedKeys(),...this.$refs.treeRef.getHalfCheckedKeys()];
        const idStr = keys.join(',');
        const {data : res} = await this.$http.post(`roles/${this.roleId}/rights`,{ rids: idStr });
        if( res.meta.status !== 200){
            return this.$message.error('分配权限失败');
        }

        this.$message.success('分配权限成功！');
        this.getRolesList();
        this.setRightDialogVisible = false;
    }
  }
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 10px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>